/* ArtMarket design system — mobile-first, light/dark, WCAG AA contrast. */
:root{
  --bg:#faf9f7; --surface:#ffffff; --surface-2:#f5f4f2; --ink:#1c1917; --muted:#57534e;
  --brand:#7c2d12; --brand-hover:#9a3412; --brand-ink:#ffffff;
  --accent:#0c4a6e; --ok:#15803d; --warn:#b45309; --bad:#b91c1c;
  --line:#e7e5e4; --radius:14px; --radius-s:10px;
  --shadow:0 6px 24px rgba(28,25,23,.08); --shadow-l:0 12px 40px rgba(28,25,23,.14);
  --space:16px; --max:1180px;
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Inter,"Helvetica Neue",Arial,sans-serif;
}
[data-theme="dark"]{
  --bg:#0c0a09; --surface:#1c1917; --surface-2:#292524; --ink:#f5f5f4; --muted:#c9c2bb;
  --brand:#ea580c; --brand-hover:#f97316; --brand-ink:#111111;
  --line:#3a3532; --shadow:0 6px 24px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--font)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent)}
[data-theme="dark"] a{color:#7dd3fc}
.wrap{max-width:var(--max);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:8px;top:8px;background:var(--surface);padding:10px;z-index:99}
/* top bar */
.topbar{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topbar-in{display:flex;align-items:center;gap:12px;min-height:60px}
.brand{font-weight:800;font-size:20px;letter-spacing:.3px;text-decoration:none;color:var(--ink)}
.topnav{display:flex;gap:4px;margin-left:auto;align-items:center}
.topnav a{color:var(--ink);text-decoration:none;padding:12px 10px;min-height:44px;display:inline-flex;align-items:center;border-radius:10px}
.topnav a:hover{background:var(--surface-2)}
.theme-toggle{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;min-width:44px;min-height:44px;cursor:pointer}
/* hero + cards */
.hero{padding:40px 0 24px}
.hero h1{font-size:clamp(28px,5vw,52px);line-height:1.1;margin:0 0 12px}
.hero p{color:var(--muted);max-width:60ch}
.grid{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}
@media(min-width:720px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(min-width:1024px){.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.art-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.art-card .im{aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.art-card .im img{width:100%;height:100%;object-fit:cover}
.art-card .bd{padding:12px 14px;display:flex;flex-direction:column;gap:4px}
.art-card .t{font-weight:700;text-decoration:none;color:var(--ink)}
.art-card .m{color:var(--muted);font-size:14px}
.art-card .p{font-weight:700;margin-top:4px}
/* badges */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;border-radius:999px;padding:4px 12px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);white-space:nowrap}
.badge.live{background:#dcfce7;border-color:#86efac;color:#14532d}
.badge.sold{background:#fee2e2;border-color:#fca5a5;color:#7f1d1d}
.badge.pending{background:#fef3c7;border-color:#fcd34d;color:#78350f}
.badge.rejected{background:#fee2e2;border-color:#fca5a5;color:#7f1d1d}
.badge.info{background:#e0f2fe;border-color:#7dd3fc;color:#0c4a6e}
[data-theme="dark"] .badge.live{background:#14532d;color:#dcfce7}
[data-theme="dark"] .badge.sold{background:#7f1d1d;color:#fee2e2}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 22px;border:1px solid var(--line);background:var(--surface);color:var(--ink);text-decoration:none;min-height:44px;min-width:44px;cursor:pointer;font:inherit;font-weight:600}
.btn-primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:var(--brand-hover)}
.btn-danger{background:var(--bad);border-color:var(--bad);color:#fff}
.btn-sm{padding:8px 14px;min-height:40px;font-size:14px}
/* forms */
.field{margin:12px 0}
.field>label,.field>span.lbl{display:block;font-weight:600;margin-bottom:4px}
.field input,.field select,.field textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:var(--radius-s);min-height:44px;background:var(--bg);color:var(--ink);font:inherit}
.field textarea{min-height:110px}
.err{color:var(--bad);font-size:14px}
.hint{color:var(--muted);font-size:14px}
.auth{max-width:520px;margin:32px auto}
.role-pick{display:grid;gap:12px;grid-template-columns:1fr 1fr;margin:12px 0}
.role-card{border:2px solid var(--line);border-radius:var(--radius);padding:14px;cursor:pointer;display:flex;flex-direction:column;gap:4px}
.role-card:has(input:checked){border-color:var(--brand)}
.role-card span{color:var(--muted);font-size:14px}
/* filters */
.filters{display:grid;gap:10px;grid-template-columns:1fr 1fr;margin:16px 0}
@media(min-width:720px){.filters{grid-template-columns:repeat(6,1fr)}}
.filters input,.filters select{padding:10px;border:1px solid var(--line);border-radius:10px;min-height:44px;background:var(--surface);color:var(--ink);width:100%;font:inherit}
/* tables collapse to cards */
.table{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden}
.table th,.table td{padding:12px;text-align:left;border-bottom:1px solid var(--line)}
@media(max-width:719px){
  .table thead{display:none}
  .table,.table tbody,.table tr,.table td{display:block;width:100%}
  .table tr{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;background:var(--surface)}
  .table td{border:0;display:flex;justify-content:space-between;gap:12px}
  .table td::before{content:attr(data-l);font-weight:700;color:var(--muted)}
}
/* artwork detail */
.detail{display:grid;gap:20px}
@media(min-width:900px){.detail{grid-template-columns:7fr 5fr}}
.preview{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;cursor:zoom-in}
.preview.zoom img{transform:scale(1.8);cursor:zoom-out}
.preview img{transition:transform .25s ease;width:100%}
.price{font-size:28px;font-weight:800}
.artist-card{display:flex;gap:12px;align-items:center;padding:12px 0}
.avatar{width:52px;height:52px;border-radius:50%;background:var(--surface-2);display:flex;align-items:center;justify-content:center;font-weight:800;overflow:hidden}
/* timeline */
.timeline{list-style:none;margin:0;padding:0}
.timeline li{position:relative;padding:0 0 18px 28px}
.timeline li::before{content:"";position:absolute;left:8px;top:6px;width:9px;height:9px;border-radius:50%;background:var(--brand)}
.timeline li::after{content:"";position:absolute;left:12px;top:20px;bottom:0;width:2px;background:var(--line)}
.timeline li:last-child::after{display:none}
/* toasts */
.toast{border-radius:12px;padding:12px 16px;margin:12px 0;border:1px solid var(--line);background:var(--surface)}
.toast.ok{border-color:#86efac;background:#f0fdf4;color:#14532d}
.toast.err{border-color:#fca5a5;background:#fef2f2;color:#7f1d1d}
[data-theme="dark"] .toast.ok{background:#14532d;color:#dcfce7}
[data-theme="dark"] .toast.err{background:#7f1d1d;color:#fee2e2}
/* modal */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px}
.modal{background:var(--surface);border-radius:var(--radius);padding:24px;max-width:440px;width:100%}
/* empty + skeleton */
.empty{padding:48px 16px;text-align:center;color:var(--muted)}
.skel{border-radius:var(--radius);background:linear-gradient(90deg,var(--surface-2) 25%,var(--line) 50%,var(--surface-2) 75%);background-size:200% 100%;animation:sh 1.2s infinite}
@keyframes sh{to{background-position:-200% 0}}
/* dashboard shell (used in later phases) */
.shell{display:grid;gap:0}
@media(min-width:900px){.shell{grid-template-columns:240px 1fr}}
.side{background:var(--surface);border-right:1px solid var(--line);padding:16px;display:none}
@media(min-width:900px){.side{display:block;position:sticky;top:60px;align-self:start;min-height:calc(100vh - 60px)}}
.side a{display:flex;align-items:center;gap:10px;padding:12px;border-radius:10px;text-decoration:none;color:var(--ink);min-height:44px}
.side a.on,.side a:hover{background:var(--surface-2)}
.stat-grid{display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}
@media(min-width:720px){.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}
.stat .n{font-size:24px;font-weight:800}
.stat .l{color:var(--muted);font-size:13px}
/* bottom tab bar (mobile) */
.tabbar{display:flex;position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--line);z-index:20;padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{flex:1;text-align:center;text-decoration:none;color:var(--ink);font-size:12px;padding:10px 4px 8px;min-height:56px}
@media(min-width:900px){.tabbar{display:none}.has-tabbar{padding-bottom:0}}
.has-tabbar{padding-bottom:76px}
/* pagination */
.pager{display:flex;gap:8px;justify-content:center;margin:24px 0;flex-wrap:wrap}
.pager a,.pager span{border:1px solid var(--line);border-radius:10px;padding:10px 16px;min-height:44px;text-decoration:none;color:var(--ink);background:var(--surface)}
.pager .on{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}
.search-wrap{position:relative}
.suggest{position:absolute;top:100%;left:0;right:0;background:var(--surface);border:1px solid var(--line);border-radius:12px;z-index:30;overflow:hidden}
.suggest a{display:block;padding:12px;text-decoration:none;color:var(--ink)}
.suggest a:hover{background:var(--surface-2)}
.footer{border-top:1px solid var(--line);margin-top:48px;padding:24px 0;color:var(--muted)}
.footer nav{display:flex;gap:16px;flex-wrap:wrap}
.steps{list-style:none;counter-reset:s;padding:0;display:grid;gap:12px}
.steps li{counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px 14px 14px 52px;position:relative}
.steps li::before{content:counter(s);position:absolute;left:14px;top:14px;width:26px;height:26px;border-radius:50%;background:var(--brand);color:var(--brand-ink);display:flex;align-items:center;justify-content:center;font-weight:800}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px}
.kv dt{color:var(--muted)} .kv dd{margin:0}
.copy-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
code.addr{background:var(--surface-2);border:1px solid var(--line);border-radius:8px;padding:8px 10px;word-break:break-all;font-size:13px}
.qr{background:#fff;padding:12px;border-radius:12px;display:inline-block}
.prog{height:10px;border-radius:999px;background:var(--surface-2);overflow:hidden}
.prog>i{display:block;height:100%;background:var(--brand)}
.ring{width:84px;height:84px}